包含标签：Java 的文章
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Java – if multiple threads are updating the same variable, what should be done to update the variable correctly for each thread?
If multiple threads are updating the same variable, what should I do to update the variable correctly for each thread?…… -
Java – how to inject beans into ApplicationContext before loading from a file?
I have a filesystemxmlapplicationcontext. I want the bean defined in XML as a constructor parameter, a bean that is no…… -
Java expression compilation error
See English answers > why is n + + + n valid while N + + + n is not? one int x=-3; System.out.println(x-----x);…… -
java – Short toHexString
There is a method integer Tohexstring() and long toHexString(). For some reason, they did not implement short toHexStr…… -
Java – save treeviewer state before setinput()
I tried to save the Jface treeviewer extension state to refresh it after calling the setinput () method I tried the se…… -
Java – spring – constructor injects and overrides the parent definition of nested beans
I read the resources for spring 3 in inheriting bean definitions, but I'm confused about what's possible and impossibl…… -
Java – compare and exchange
As the title indicates, I am looking for a comparison and exchange implementation, but it is relatively large: if(newV…… -
Java – how to initialize BigInteger after creating an instance (constructor cannot be called)
Imagine an instance of BigInteger, so how do you initialize it after you create it? For example: BigInteger t = new Bi…… -
Java – interfaces and concrete classes
Below I have a person interface, an implementation class and a driver class, which initializes person with a name and …… -
Java – create a directory, if it does not exist, and then create the files in that directory
The condition is that if a directory exists, you must create files in that specific directory and create a new directo…… -
Guava’s immutablelist Is the builder thread safe?
Guava’s ImmutableList. What is the thread security of builder? Javadoc doesn't say Solution Although guava invariant c…… -
Java – why does jodatime and calendar return different results
Why did this test fail: DateTime dateTime = new DateTime(1997,01,00,DateTimeZone.UTC); long jodaMills = dateTime.g…… -
Java – Apache nutch – path problem
I tried to set Apache nutch to grab the URL and follow this guide As an old guide (this guide is 1. X, I use 2.3), I h…… -
Java – jooq and transactions
I've been reading about transactions & jooq, but it's hard for me to see how to implement it in practice Suppose I…… -
Java – a good working example of selenium 2 and webdriver
I've been using selenium 1, but now I want to migrate to selenium 2 / webriver To be honest, I find it a little diffic…… -
java – Hibernate：org. hibernate. hql. ast. Querysyntaxexception: unexpected token
I use hibernate. I have this query: List<Person> list = sess.createQuery("from Person").list(); With this statem…… -
Replace all substrings that appear in the string – is this more efficient in Java?
I know two ways to replace all substrings in a string Regular expression (assuming that "sub character substitution" d…… -
Java – how to query the values of columns set in parse as pointers to other tables
I use parse as my application. I want to query a table in which columns are set as pointers to other tables This is a …… -
Java – why can’t a class extend a static nested class?
This class: public class OuterChild extends OuterChild.InnerParent { public static class InnerParent { } } Una…… -
Java is backward compatible, but why do we need to upgrade many libraries when we upgrade the JDK from 1.6 to 1.8?
Recently, I upgraded the JDK version from 1.6 to 1.8 in a java project However, there are some compilation or runtime …… -
Java – how to get files from a resource folder Spring framework
I tried to dissolve my XML file: public Object convertFromXMLToObject(String xmlfile) throws IOException { FileInp…… -
Print an integer with 2 decimal places in Java
In my code, I use integers multiplied by 100 as decimals (0.1 is 10, etc.) Can you format the output for me to display…… -
Java – parse manifest.xml in jar What is the correct method for entries in MF files?
Manifest.jar included in many Java jars MF contains headers that look like headers See example [*] I want something th…… -
Java – vertx Web: where do I put the Webroot folder?
It should be easy, but not so far I've been using vert X 2 and recently switched to vert x 3. I thought I would try a …… -
You can (and how to) use javax in EJB modules naming. Context #lookup find CDI managed beans?
Yes (if so, how?) Using javax. XML in EJB modules naming. Context #lookup find CDI managed beans? I use GlassFish v3 I…… -
How do I format the Spanish month in a sentence using simpledateformat?
This is my code: /* package whatever; // don't place package name! */ import java.util.*; import java.lang.*; import …… -
How to get the unique ID of each object in Java?
See the English answer > how to get the unique ID of an object which overrides hashcode()? 9 It should be object an…… -
Java – prevent SWT scrolledcomposite from eating part of it
What did I do wrong? This is my code excerpt public void createPartControl(Composite parent) { parent.setLayout(new …… -
The fastest way to write integer arrays to files in Java?
As the title says, I'm looking for the fastest way to write integer arrays to files Arrays vary in size and can actual…… -
Check whether the fastest method in string can be resolved to double in Java
I know there are a million ways to do this, but what's the fastest? This should include scientific notation Note: I'm …… -
Java – where the result set is stored when using JDBC and Oracle drivers
Once I use JDBC with the Oracle driver and run the select query, do I store the query results in Oracle memory or file…… -
Java – how to use the eclipse generated WebService client class?
I use eclipse Helios to create a web service client to consume an axis 1.4 web service The internal client package has……